Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 220: | \[{18^{220}-1\over17}\] | 53 × 112 × 13 × 19 × 23 × 41 × 89 × 199 × 3312 × 2711 × 9041 × 15101 × 16127 × 21341 × 51217 × 145501 × 536801 × 1105501 × 6301307 × 11502811 × 50790191 × 142022651 × 6749141521<10> × 55547468813<11> × 2570735949673<13> × 125500908706801<15> × 12909881728770411001<20> × 24079647987394646183428194161<29> × 4969929912382242483969355497060426638861<40> × 225951167273603305782176554748672304301510146440401<51> |